The base of this module is CY8C9560A IO extender chip. A single
socket from mainboard will add 60 inputs/outputs with interrupt
capability. Also, 16 of these pins can be PWM signals. The signals with
PWM are exposed on header-placement so it is easy to add standard RC
servo motors. Adding 16 servo motors was never easier.
note: Inputs are 3.3V (not 5V tolerant). Outputs can source up to 10mA
and sink up to 25mA each. See CY8C9560A datasheet for more details
Socket: X or Y (Board only lists X, but Y is also supported)